Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5ed0fcf958f688…

MALICIOUS

PDF

97.7 KB Created: 2021-06-26 10:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 26ed1800b118b94282b7900908627af6 SHA-1: fb4120f69c5493982ebb1dad98db9f906b2e2f0c SHA-256: 8c5ed0fcf958f688152ce5af5175116ce84d16589cd477b8d205c8619b6d2698
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised WordPress installations, suggesting a link farm designed to distribute malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into believing they have won a prize or are expecting a delivery, a common tactic for advance-fee fraud. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9678

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://oniceh.ru/uplcv?utm_term=porn+star+imges
    • http://coreaad.com/DreamDataUpload/file/3282410676.pdf
    • http://vansuloi.com/uploads/userfiles/file/xurazolagasitumo.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16070c5b497653---74702057857.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f72eeb645f---wubolomeruvulobo.pdf
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tunavawimugumeguzorunud.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/eb4043364c14bca82c089b55d88c66ac/xotenumavaji.pdf
    • http://tnslib.net/userfiles/files/57597739339.pdf
    • http://adamlegal.com/userfiles/file/66024942273.pdf
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/175261fab6240f378654f99a97a27b1d/regefikux.pdf
    • http://ipceurope.eu/assets/file/xevebaduvuv.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f542584a3f---xofojevatekamer.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094503a48fae---57674000564.pdf
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/6857d5f81db259abe247d73a7c83d4b5/bijesapilexuz.pdf
    • http://akcjonariusz.com/UserFiles/file/3259446957.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b74e0924197---bijagubixuzaveguside.pdf
    • http://amoy-art.com/Upload/file/62628032796.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/8ca6bf43b2cdea0fb62ec3c6f0b14423/96963912925.pdf
    • http://bem-sa.com/img/file/midusididozerevov.pdf
    • http://pvvc.cz/files/kunuludimusafudoredotomu.pdf
    • http://congtydaihai.com/upload/files/50554148069.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/8khcdu5op4shf33g7aoof3am4u/rubuvijixajuzowedajat.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/904509fc9d16fa0adfd0c73135e83d75/13377199533.pdf
    • https://bloomeng.com/uploads/41220680054.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730dfeb1e85---vilino.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd942b46cc---doxezemesug.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/178a7ea8c1048a1f3ecdd5e36194a409/posesiperepaxulatam.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106d8.bin
a49953813129f7bb5bbbf500d2aa5416a8dd60aead57ad7269803bf3f4c17c27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106D8 10404 bytes
font_01_sfnt_off00011e6e.bin
74cc3147256bb8b0eac7321536405b2749fd862c905072f6e59bf3287c76c50a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6E 17396 bytes
font_02_sfnt_off00014b9f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B9F 16792 bytes
font_03_sfnt_off000163b0.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x163B0 16092 bytes

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